Malicious PDF — malware analysis report

Static analysis result for SHA-256 07a639730dde5dc9…

MALICIOUS

PDF

45.9 KB Created: 2020-08-25 01:44:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86d9979397d19c5f1df837e9dc71cf65 SHA-1: 9726d8fc8cbef36091b8d58f2146a15abae175fb SHA-256: 07a639730dde5dc91a71b6257ca7d9abaf643cae8ad7d6cab092600df166b0e1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links and text that mimic an IRS form, a common lure for advance-fee scams. One of the primary links directs to a known malicious redirector, suggesting an attempt to lead the user to malicious infrastructure. The document also functions as a link farm, distributing numerous links to other PDFs, likely for SEO manipulation or to spread further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=cafeteria+plan+irs+form
    • http://files.alboagency.com/uploads/1/3/0/7/130739024/c75b938b7f0bd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/8466/1414/files/vietnam_esports_market_report_2018.pdf
    • https://cdn.shopify.com/s/files/1/0437/4436/2647/files/molecular_genetics_full_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/83768404562.pdf
    • https://cdn.shopify.com/s/files/1/0430/1586/4473/files/github_create_branch.pdf
    • https://cdn.shopify.com/s/files/1/0436/6978/2693/files/27047909863.pdf
    • https://cdn.shopify.com/s/files/1/0457/3931/1260/files/14361310664.pdf
    • https://cdn.shopify.com/s/files/1/0432/1368/4891/files/lefuwufosetodawaxojaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/9764/4444/files/kesowatirotekelo.pdf
    • https://cdn.shopify.com/s/files/1/0457/3698/4732/files/igcse_percentage_uniform_mark.pdf
    • https://cdn.shopify.com/s/files/1/0430/5128/6690/files/30923027361.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34888362351.pdf
    • https://cdn.shopify.com/s/files/1/0431/1239/9010/files/96774316491.pdf
    • https://cdn.shopify.com/s/files/1/0439/4926/0968/files/99959456118.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007657.bin
6eb1bae9999b05d4495e6cc7cfe5089cfc8d6470fc981080081eaa16ce896e45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7657 4952 bytes
font_01_sfnt_off00008715.bin
20b3d8aa5499c6b617a164c39ed1427cf0a60f9d013bcf00c0b2d72a6175417b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8715 10492 bytes

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